Hi @xSenny,
Thanks for reaching out and welcome to Netlify’s Support Forums!
I’m not showing that the subdomain, links.xsenny.dev has been assigned to the site. You can follow this Netlify doc for assigning custom domains to a production site. I believe this is why you’re seeing the Site Not Found from your second screenshot.
In addition, I see you have a Netlify DNS zone setup for xsenny.dev, however currently, the name servers are pointing to Cloudflare instead of the Netlify name servers mentioned here:
Follow this Support Guide for fixing inactive DNS Zones:
Let us know if you have any questions.